Everyone that also uses Google: There's another HUGE privacy flaw you probably don't know about. Google Social Search releases the names of your chat contacts to everyone you know, and you can't opt out of it.

Google Social Search reveals all of your chat contacts to each other, and there is no way to opt out even if you DON'T HAVE A GOOGLE PROFILE. If you thought buzz was bad, at least you could opt out of that. To get out of this, you have to stop using Google Chat altogether.